Dynamo-electric machine.



No. 669,573. Patented Mar. I2, |901. A. R. BLISS.

uvnAno :Lemme nAcHme.

(Application filed June 25, 1900.)

UNiTnD STATES PATENT OFFICE.

AMOS Pt. BLSS, OF LOVELL, MASSACHUSETTS, ASSIGNOR TO THE NEV ENGLANDMOTOR COMPANY, OF MASSACHUSETS.

DYNAIVO-ELEGTRBG MACHBN..

SPEGI'FCATON forming part of Letters Patent No. 669,573, dated March 12,1901.

Application filed June 25, 1900.

Be it known that I, AMOS lit. BLISS, of Lowell, county of Middlesex, andState of Massachusetts, have invented an improvement in Dynamo-ElectricMachines, of which the iollowing description, in connection with theaccom panying` drawings, is a specification, like letters on thedrawings representing like parts.

The present invention relates to a multipolar dynamo-electric machine,and is embodied in a novel construction and arrangement of thefield-frame and armature-support whereby the armature and its supportare practically independent of the held-frame and adjustably connectedtherewith, so that the said armature and its support may be adj ustablyconnected with the said frame and the armature properly positioned withrelation to the field-magnets without special f1tting.

ln accordance with the invention the armature support or spider, as itmay he termed, contains the armature-bearings and has three or moresupporting` members adapted to engage the field-frame between thepole-pieces, so as to properly center and support the armature withoutinterfering with the said polepieces, the said spider being adj ustablyeonnected with the field-frame. By arranging the several supportingmembers to correspond with the spaces between the pole-pieces, whichproject inward from the field-traine, and providing the said Field-framewith fastening devices or openings to receive fastening devices betweenadjacent pole-pieces the said frame may be set up in any desiredposition-t'. e., on the floor, wall, or ceiling-and the armature-spidersecured therein in such a way that one or more of the supportingportions will bear against the frame below the armature-bearing, so asto properly sustain the Weight of the armature, the other membersinsuring the proper centering of the armature-shaft.

Figure l is an end elevation of a dynamoelect-ric machine embodying theinvention. Fig. 2 is a plan view of the saine, the fieldframe beingshown in section to illustrate the manner of fastening thearmature-spider; and Fig. 3 is an end elevation showing a modi- SerialNo. 21.480. (No modelo iication in which the armature-spider isespecially adapted for a machine having six polar extremities.

As herein shown, the held-frame a is cylindrical in shape, so as to beadapted for any number of pole-pieces, the said pole-pieces a2 beingshown as secured to the said frame by means oi bolts a3 and projectinginward therefrom in the usual way, so that the polar extremities orpole-shoes d'1 will properly surround the armature b. The armature-shaftb2, in accordance with the invention, is supported in a spider o3, whichis entirely independent of the Afield-frame a, but adapted to be securedthereto in such a way as to properly posit-ion the armature withrelation to the polar extremities d". The said armai urespider isprovided with three or more supporting portions haat least one of whichprojects downward to form the necessary strut or support, upon which theweight of the armature is mainly borne.

By properly spacing the Supporting portions lrl the said portions can beinserted endwise between adjacent. pole-pieces, and the wholearmature-spider, thus properly supported and centered by the downwardlyand laterally projecting` portions b4, respectively, can belongitudinally adj usted with relation to the frame to position thearmature with relation to the magnetic Field. The projections b" areshown as in the forni of bows so as to surround the armature, and thatpart ol each bow which is parallel to the armature-shaft is providedwith a slot Zr" te receive a bultos, Fig. 2, or equivalent fasteningdevice, the slots thus providing for the longitudinal adjustment of thespider as a whole.

In Figs. l and 2 the invention is shown as embodied in a four-pole motorand in Fig. 3 as embodied ina six-pole motor, the construction of thespiderbeing substantiallyihe saine in both cases. ln a six-pole motor,as shown in Fig. 3, the armature-spider may be provided with four ot'the supporting portions b4, two of the said portions projectingdownward, but being inclined from a vertical position, so as to straddlethe lower-most pole-piece ot' the field-frame, it being obvious that theinvention may be adapted for use with machines having` any desirednumber of poles.

IOO

By providing` the held-magnet frame with means for inserting suitablefastening devices between adjacent poles it is obvious that the said`frame may be set up in any position desired-that is, the base portionthereof may be horizontally secured to a ceiling or beam, with the frameprojecting down- Wardly,or may be verticallysecu red to a Wall* and inany case the armature-spider may be so inserted as to properly supportthe armature Without disturbing any part of the frame. In any positionof the armature-spider there will be substantially vertical supports tomainly sustain the weight of the armature and lateral supports toproperly center the same with relation to the polar extremities of theHeld.

I claiml. The combination With the field-magnet frame of adynamo-electric machine; oli' an armature support or spider adapted tobe slid endwise into the frame and having three or more projectingmembers adapted to engage the inner surface of the said frame to therebyproperly center and support the armature with relation to said frame, asset forth.

2. The combination with the field-magnet frameol'l a dynamo-electricmachine, provided with inwardly-projecting pole-pieces; of an armaturesupport or spider provided with three or more projecting members sospaced as to engage the said frame between adjacent pole-pieces toproperly center and support the said armature, the said support orspider thus being removable endwise with out removing or displacing thefield-magnets or polepieces thereof.

3. The combination with the field-magnet frame of a dynamo-electricmachine; ol an armature support or spider having three or more points ofsupport adapted to engage the said field-magnet frame between theinwardlyprojecting pole-pieces, the frame being arranged to receivefastening devices between adjacent poles; and means for longitudinallyadjusting the armature support or spider with relation to saidField-magnet frame, as set forth.

4:. The combination with the field-magnet frame of a dynamo-electricmachine; of an armature support or spider having bearings for thearmature; and three or more bowshaped members extending vfrom onebearing to the other around the aru'iature; the outer surfaces of saidmembers fitting the inner surface of the field-magnet frame, as setforth.

In testimony whereof l have signed my name to this specification in thepresence ol two subscribing witnesses.

AMOS It. BLISS.

YWitnesses:

NANCY P. Fono, HENRY J. Limi-moan.

